/*
 * 版权所有 (C) 2015 知启蒙(ZHIQIM) 保留所有权利。[遇见知启蒙，邂逅框架梦，本文采用木兰宽松许可证第2版]
 * 
 * https://zhiqim.org/project/zhiqim_components/zhiqim_upload_large.htm
 *
 * Zhiqim UploadLarge is licensed under Mulan PSL v2.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *          http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 */
package org.zhiqim.uploadlarge.action;

import org.zhiqim.httpd.HttpRequest;
import org.zhiqim.httpd.context.core.Action;
import org.zhiqim.kernel.util.Files;
import org.zhiqim.kernel.util.Ints;
import org.zhiqim.kernel.util.Validates;
import org.zhiqim.orm.ORM;
import org.zhiqim.orm.dbo.Selector;
import org.zhiqim.uploadlarge.dbo.UpllChunk;

/**
 * 删除文件碎片功能
 *
 * @version v1.0.0 @author zouzhigang 2014-3-21 新建与整理
 */
public class FileChunkDeleteAction implements Action
{
    public void execute(HttpRequest request) throws Exception
    {
        String fileId = request.getParameter("fileId");
        if (Validates.isEmpty(fileId) || fileId.indexOf(",") == -1)
        {
            request.returnHistory("请选择一个有效的数据");
            return;
        }
        
        int ind = fileId.indexOf(",");
        String fileMd5 = fileId.substring(0, ind);
        int chunkSize = Ints.toInt(fileId.substring(ind+1), -1);
        if (!Validates.isAlphaNumericLen(fileMd5, 48, 48) || chunkSize == -1)
        {
            request.returnHistory("请选择一个有效的数据");
            return;
        }
        
        //选删除文件，再删除数据库数据
        Selector selector = new Selector();
        selector.addMust("fileMd5", fileMd5);
        selector.addMust("chunkSize", chunkSize);
        UpllChunk chunk = ORM.table().item(UpllChunk.class, selector);
        
        Files.deleteFile(chunk.getFileTempPath());
        
        ORM.table().delete(UpllChunk.class, selector);
    }
}
